Post by thread:[PIC:] putsUSART() : how to avoid the terminating

Hi, Piclisters ! In a C18 program I would like to send to 18F242's Usart a char string using a single (standard) function call AND without outputting the string's trailing null char (\000). Does any Piclister know how to do it using standard functions in C18 ? Of course, I could write my own function to do it (sending char by char to the Usart while avoiding the trailing null), but I think that it should be possible to do this with a standard function call. Unfortunatelly 'putsUSART()' function "writes a string of characters to the USART including the null character" ("MPLAB C18 C Compiler Libraries") :-(( I guess that I miss some other function, but I am not able to locate it in the manual ... Any help to overcome this annoyance will be appreciated ! Joan Ilari Barcelona (Spain) ================================================================ ... I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watched C-beams glitter in the dark near Tannhauser Gate. All those moments will be lost in time, like tears in rain ... Time to die ... -Blade Runner - ================================================================ -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

I also wrote my own function to get around this "feature." It's real easy to do by just copying their source code and modifying it. I created my own file of usart functions that I call UART.c. I just call these when I want a more logical result. Another function I rewrote, as I recall (I'm not at work right now) is putcUSART so it would wait for the USART to be ready. As I recall, putcUASRT just dumps the argument into the USART data register. Harold > Joan, This is just how it is, I don't know why thay implemented it this > way; > you have to write your own function to overcome this problem, using single > character I/O calls. Peter Moreton > > >> {Original Message removed}

> Unfortunatelly 'putsUSART()' function "writes a string of > characters to the > USART including the null character" ("MPLAB C18 C Compiler > Libraries") :-(( You could always modify their function to do it the way you want. Certainly look at the code for it, and make sure the documentation is correct. There is always the possibility that the documentation is incorrect, and that the null is used to terminate the operation without being transmitted. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> You could always modify their function to do it the way you want. > > Certainly look at the code for it, and make sure the > documentation is correct. There is always the possibility > that the documentation is incorrect, and that the null is > used to terminate the operation without being transmitted. > The null char is really transmitted. I saw it when debugging the program and having a look at the hex chars received at the other side of the serial line. It was then that I read the manual and found this (for me) nonsense feature. I cannot think on an application where this null char could be of interest !. Joan -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.